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GitHub Monospace Font Toggle

A userscript that adds monospace font toggle to comments

当前为 2016-09-30 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name         GitHub Monospace Font Toggle
  3. // @version      1.1.0
  4. // @description  A userscript that adds monospace font toggle to comments
  5. // @license      https://creativecommons.org/licenses/by-sa/4.0/
  6. // @namespace    https://github.com/StylishThemes
  7. // @include      https://github.com/*
  8. // @grant        GM_addStyle
  9. // @run-at       document-end
  10. // @author       StylishThemes
  11. // ==/UserScript==
  12. /* global GM_addStyle */
  13. /* jshint esnext:true, unused:true */
  14. (function() {
  15.   "use strict";
  16.   /*
  17.   This code is also part of the GitHub-Dark Script
  18.   (https://github.com/StylishThemes/GitHub-Dark-Script)
  19.   Extracted out into a separate userscript in case users
  20.   only want to add this functionality
  21.   */
  22.   let busy = false;
  23.  
  24.   const icon = `
  25.     <svg class="octicon" xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewbox="0 0 32 32">
  26.       <path d="M5.91 7.31v8.41c0 .66.05 1.09.14 1.31.09.21.23.37.41.48.18.11.52.16 1.02.16v.41H2.41v-.41c.5 0 .86-.05 1.03-.14.16-.11.3-.27.41-.5.11-.23.16-.66.16-1.3V11.7c0-1.14-.04-1.87-.11-2.2-.04-.26-.13-.42-.24-.53-.11-.1-.27-.14-.46-.14-.21 0-.48.05-.77.18l-.18-.41 3.14-1.28h.52v-.01zm-.95-5.46c.32 0 .59.11.82.34.23.23.34.5.34.82 0 .32-.11.59-.34.82-.23.22-.51.34-.82.34-.32 0-.59-.11-.82-.34s-.36-.5-.36-.82c0-.32.11-.59.34-.82.24-.23.51-.34.84-.34zm19.636 19.006h-3.39v-1.64h5.39v9.8h3.43v1.66h-9.18v-1.66h3.77v-8.16h-.02zm.7-6.44c.21 0 .43.04.63.13.18.09.36.2.5.34s.25.3.34.5c.07.18.13.39.13.61 0 .22-.04.41-.13.61s-.19.36-.34.5-.3.25-.5.32c-.2.09-.39.13-.62.13-.21 0-.43-.04-.61-.12-.19-.07-.35-.19-.5-.34-.14-.14-.25-.3-.34-.5-.07-.2-.13-.39-.13-.61s.04-.43.13-.61c.07-.18.2-.36.34-.5s.31-.25.5-.34c.17-.09.39-.12.6-.12zM2 30L27.82 2H30L4.14 30H2z"/>
  27.     </svg>
  28.   `;
  29.  
  30.   // Add monospace font toggle
  31.   function addMonospaceToggle() {
  32.     busy = true;
  33.     const button = document.createElement("button");
  34.     button.type = "button";
  35.     button.className = "ghd-monospace toolbar-item tooltipped tooltipped-n";
  36.     button.setAttribute("aria-label", "Toggle monospaced font");
  37.     button.setAttribute("tabindex", "-1");
  38.     button.innerHTML = icon;
  39.     Array.from(
  40.       document.querySelectorAll(".toolbar-commenting")
  41.     ).forEach(el => {
  42.       if (el && !el.querySelector(".ghd-monospace")) {
  43.         el.insertBefore(button.cloneNode(true), el.childNodes[0]);
  44.       }
  45.     });
  46.     busy = false;
  47.   }
  48.  
  49.   function closest(el, selector) {
  50.     while (el && el.nodeName !== "BODY" && !el.matches(selector)) {
  51.       el = el.parentNode;
  52.     }
  53.     return el && el.matches(selector) ? el : [];
  54.   }
  55.  
  56.   function addBindings() {
  57.     document.querySelector("body").addEventListener("click", function(event) {
  58.       var textarea, active,
  59.         target = event.target;
  60.       if (target && target.classList.contains("ghd-monospace")) {
  61.         textarea = closest(target, ".previewable-comment-form");
  62.         textarea = textarea.querySelector(".comment-form-textarea");
  63.         textarea.classList.toggle("ghd-monospace-font");
  64.         textarea.focus();
  65.         active = textarea.classList.contains("ghd-monospace-font");
  66.         target.classList[active ? "add" : "remove"]("text-blue");
  67.         return false;
  68.       }
  69.     });
  70.   }
  71.  
  72.   // don't initialize if GitHub Dark Script is active
  73.   if (!document.querySelector("#ghd-menu")) {
  74.     // monospace font toggle
  75.     GM_addStyle(`
  76.       .ghd-monospace-font { font-family: Menlo, Inconsolata, "Droid Mono",
  77.         monospace !important; font-size: 1em !important; }
  78.       .ghd-monospace > svg { pointer-events: none; }
  79.     `);
  80.  
  81.     Array.from(
  82.       document.querySelectorAll(`
  83.         #js-repo-pjax-container,
  84.         #js-pjax-container,
  85.         .js-preview-body
  86.       `)
  87.     ).forEach(target => {
  88.       new MutationObserver(mutations => {
  89.         mutations.forEach(mutation => {
  90.           if (!busy && mutation.target === target) {
  91.             addMonospaceToggle();
  92.           }
  93.         });
  94.       }).observe(target, {
  95.         childList: true,
  96.         subtree: true
  97.       });
  98.     });
  99.  
  100.     addBindings();
  101.     addMonospaceToggle();
  102.   }
  103. })();